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-rw-r--r--vendor/github.com/google/gopacket/tcpassembly/assembly_test.go562
1 files changed, 562 insertions, 0 deletions
diff --git a/vendor/github.com/google/gopacket/tcpassembly/assembly_test.go b/vendor/github.com/google/gopacket/tcpassembly/assembly_test.go
new file mode 100644
index 0000000..1bd2842
--- /dev/null
+++ b/vendor/github.com/google/gopacket/tcpassembly/assembly_test.go
@@ -0,0 +1,562 @@
+// Copyright 2012 Google, Inc. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file in the root of the source
+// tree.
+
+package tcpassembly
+
+import (
+ "github.com/google/gopacket"
+ "github.com/google/gopacket/layers"
+ "net"
+ "reflect"
+ "testing"
+ "time"
+)
+
+var netFlow gopacket.Flow
+
+func init() {
+ netFlow, _ = gopacket.FlowFromEndpoints(
+ layers.NewIPEndpoint(net.IP{1, 2, 3, 4}),
+ layers.NewIPEndpoint(net.IP{5, 6, 7, 8}))
+}
+
+type testSequence struct {
+ in layers.TCP
+ want []Reassembly
+}
+
+type testFactory struct {
+ reassembly []Reassembly
+}
+
+func (t *testFactory) New(a, b gopacket.Flow) Stream {
+ return t
+}
+func (t *testFactory) Reassembled(r []Reassembly) {
+ t.reassembly = r
+ for i := 0; i < len(r); i++ {
+ t.reassembly[i].Seen = time.Time{}
+ }
+}
+func (t *testFactory) ReassemblyComplete() {
+}
+
+func test(t *testing.T, s []testSequence) {
+ fact := &testFactory{}
+ p := NewStreamPool(fact)
+ a := NewAssembler(p)
+ a.MaxBufferedPagesPerConnection = 4
+ for i, test := range s {
+ fact.reassembly = []Reassembly{}
+ a.Assemble(netFlow, &test.in)
+ if !reflect.DeepEqual(fact.reassembly, test.want) {
+ t.Fatalf("test %v:\nwant: %v\n got: %v\n", i, test.want, fact.reassembly)
+ }
+ }
+}
+
+func TestReorder(t *testing.T) {
+ test(t, []testSequence{
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1001,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1004,
+ BaseLayer: layers.BaseLayer{Payload: []byte{2, 2, 3}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1010,
+ BaseLayer: layers.BaseLayer{Payload: []byte{4, 2, 3}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1007,
+ BaseLayer: layers.BaseLayer{Payload: []byte{3, 2, 3}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Skip: -1,
+ Bytes: []byte{1, 2, 3},
+ },
+ Reassembly{
+ Bytes: []byte{2, 2, 3},
+ },
+ Reassembly{
+ Bytes: []byte{3, 2, 3},
+ },
+ Reassembly{
+ Bytes: []byte{4, 2, 3},
+ },
+ },
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1016,
+ BaseLayer: layers.BaseLayer{Payload: []byte{2, 2, 3}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1019,
+ BaseLayer: layers.BaseLayer{Payload: []byte{3, 2, 3}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1013,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Bytes: []byte{1, 2, 3},
+ },
+ Reassembly{
+ Bytes: []byte{2, 2, 3},
+ },
+ Reassembly{
+ Bytes: []byte{3, 2, 3},
+ },
+ },
+ },
+ })
+}
+
+func TestMaxPerSkip(t *testing.T) {
+ test(t, []testSequence{
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1000,
+ SYN: true,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Start: true,
+ Bytes: []byte{1, 2, 3},
+ },
+ },
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1007,
+ BaseLayer: layers.BaseLayer{Payload: []byte{3, 2, 3}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1010,
+ BaseLayer: layers.BaseLayer{Payload: []byte{4, 2, 3}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1013,
+ BaseLayer: layers.BaseLayer{Payload: []byte{5, 2, 3}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1016,
+ BaseLayer: layers.BaseLayer{Payload: []byte{6, 2, 3}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Skip: 3,
+ Bytes: []byte{3, 2, 3},
+ },
+ Reassembly{
+ Bytes: []byte{4, 2, 3},
+ },
+ Reassembly{
+ Bytes: []byte{5, 2, 3},
+ },
+ Reassembly{
+ Bytes: []byte{6, 2, 3},
+ },
+ },
+ },
+ })
+}
+
+func TestReorderFast(t *testing.T) {
+ test(t, []testSequence{
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ SYN: true,
+ Seq: 1000,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Start: true,
+ Bytes: []byte{1, 2, 3},
+ },
+ },
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1007,
+ BaseLayer: layers.BaseLayer{Payload: []byte{3, 2, 3}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1004,
+ BaseLayer: layers.BaseLayer{Payload: []byte{2, 2, 3}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Bytes: []byte{2, 2, 3},
+ },
+ Reassembly{
+ Bytes: []byte{3, 2, 3},
+ },
+ },
+ },
+ })
+}
+
+func TestOverlap(t *testing.T) {
+ test(t, []testSequence{
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ SYN: true,
+ Seq: 1000,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Start: true,
+ Bytes: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0},
+ },
+ },
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1007,
+ BaseLayer: layers.BaseLayer{Payload: []byte{7, 8, 9, 0, 1, 2, 3, 4, 5}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Bytes: []byte{1, 2, 3, 4, 5},
+ },
+ },
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1010,
+ BaseLayer: layers.BaseLayer{Payload: []byte{0, 1, 2, 3, 4, 5, 6, 7}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Bytes: []byte{6, 7},
+ },
+ },
+ },
+ })
+}
+
+func TestBufferedOverlap(t *testing.T) {
+ test(t, []testSequence{
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1007,
+ BaseLayer: layers.BaseLayer{Payload: []byte{7, 8, 9, 0, 1, 2, 3, 4, 5}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1010,
+ BaseLayer: layers.BaseLayer{Payload: []byte{0, 1, 2, 3, 4, 5, 6, 7}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ SYN: true,
+ Seq: 1000,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Start: true,
+ Bytes: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0},
+ },
+ Reassembly{
+ Bytes: []byte{1, 2, 3, 4, 5},
+ },
+ Reassembly{
+ Bytes: []byte{6, 7},
+ },
+ },
+ },
+ })
+}
+
+func TestOverrun1(t *testing.T) {
+ test(t, []testSequence{
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ SYN: true,
+ Seq: 0xFFFFFFFF,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Start: true,
+ Bytes: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0},
+ },
+ },
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 10,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3, 4}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Bytes: []byte{1, 2, 3, 4},
+ },
+ },
+ },
+ })
+}
+
+func TestOverrun2(t *testing.T) {
+ test(t, []testSequence{
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 10,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3, 4}},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ SYN: true,
+ Seq: 0xFFFFFFFF,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Start: true,
+ Bytes: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0},
+ },
+ Reassembly{
+ Bytes: []byte{1, 2, 3, 4},
+ },
+ },
+ },
+ })
+}
+
+func TestCacheLargePacket(t *testing.T) {
+ data := make([]byte, pageBytes*3)
+ test(t, []testSequence{
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1001,
+ BaseLayer: layers.BaseLayer{Payload: data},
+ },
+ want: []Reassembly{},
+ },
+ {
+ in: layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 1000,
+ SYN: true,
+ BaseLayer: layers.BaseLayer{Payload: []byte{}},
+ },
+ want: []Reassembly{
+ Reassembly{
+ Start: true,
+ Bytes: []byte{},
+ },
+ Reassembly{
+ Bytes: data[:pageBytes],
+ },
+ Reassembly{
+ Bytes: data[pageBytes : pageBytes*2],
+ },
+ Reassembly{
+ Bytes: data[pageBytes*2 : pageBytes*3],
+ },
+ },
+ },
+ })
+}
+
+func BenchmarkSingleStream(b *testing.B) {
+ t := layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ SYN: true,
+ Seq: 1000,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}},
+ }
+ a := NewAssembler(NewStreamPool(&testFactory{}))
+ for i := 0; i < b.N; i++ {
+ a.Assemble(netFlow, &t)
+ if t.SYN {
+ t.SYN = false
+ t.Seq++
+ }
+ t.Seq += 10
+ }
+}
+
+func BenchmarkSingleStreamSkips(b *testing.B) {
+ t := layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ SYN: true,
+ Seq: 1000,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}},
+ }
+ a := NewAssembler(NewStreamPool(&testFactory{}))
+ skipped := false
+ for i := 0; i < b.N; i++ {
+ if i%10 == 9 {
+ t.Seq += 10
+ skipped = true
+ } else if skipped {
+ t.Seq -= 20
+ }
+ a.Assemble(netFlow, &t)
+ if t.SYN {
+ t.SYN = false
+ t.Seq++
+ }
+ t.Seq += 10
+ if skipped {
+ t.Seq += 10
+ skipped = false
+ }
+ }
+}
+
+func BenchmarkSingleStreamLoss(b *testing.B) {
+ t := layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ SYN: true,
+ Seq: 1000,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}},
+ }
+ a := NewAssembler(NewStreamPool(&testFactory{}))
+ for i := 0; i < b.N; i++ {
+ a.Assemble(netFlow, &t)
+ t.SYN = false
+ t.Seq += 11
+ }
+}
+
+func BenchmarkMultiStreamGrow(b *testing.B) {
+ t := layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 0,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}},
+ }
+ a := NewAssembler(NewStreamPool(&testFactory{}))
+ for i := 0; i < b.N; i++ {
+ t.SrcPort = layers.TCPPort(i)
+ a.Assemble(netFlow, &t)
+ t.Seq += 10
+ }
+}
+
+func BenchmarkMultiStreamConn(b *testing.B) {
+ t := layers.TCP{
+ SrcPort: 1,
+ DstPort: 2,
+ Seq: 0,
+ SYN: true,
+ BaseLayer: layers.BaseLayer{Payload: []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}},
+ }
+ a := NewAssembler(NewStreamPool(&testFactory{}))
+ for i := 0; i < b.N; i++ {
+ t.SrcPort = layers.TCPPort(i)
+ a.Assemble(netFlow, &t)
+ if i%65536 == 65535 {
+ if t.SYN {
+ t.SYN = false
+ t.Seq++
+ }
+ t.Seq += 10
+ }
+ }
+}